A. Yassar et al., CRYSTAL-STRUCTURE OF ALPHA-OMEGA-BIS(TRIISOPROPYLSILYL)-SEXITHIOPHENE- UNUSUAL CONJUGATED CHAIN DISTORTION INDUCED BY INTERCHAIN STERIC EFFECTS, Advanced materials, 6(9), 1994, pp. 660-663
The structure of a sexithiophene derivative end-substituted by two bul
ky triisopropylsilyl groups has been determined in an attempt to bette
r understand the relationship between structure and the electronic and
optical properties of polythiophenes. The synthesis and structural ch
aracterization of derivative are described in detail and the unusual c
rystal system that involves staggered parallel arrays of molecules and
a strong deviation from coplanarity of the pi-conjugated backbone is
discussed.